Process optimization for the application of carbon from plantain peels in dye abstraction

TY - JOUR

T1 - Process optimization for the application of carbon from plantain peels in dye abstraction

AU - Inam, E.

AU - Etim, U. J.

AU - Akpabio, E. G.

AU - Umoren, S. A.

N1 - Publisher Copyright: © 2016 The Authors.

PY - 2017

Y1 - 2017

N2 - Activated carbon obtained from plantain peels was applied to the optimization of the adsorption process parameters for abstraction of colour from simulated dye effluent. The activated carbon was prepared and characterized using nitrogen adsorption, X-ray diffractometry (XRD) and Fourier transform infrared spectroscopy (FTIR). Equilibrium isotherms were modelled using the Langmuir, Freundlich, Dubinin–Radushkevich and Temkin models; the Temkin and Dubinin–Radushkevich models provided the best fit for the sorption process, with a correlation coefficient greater than 0.95. The D–R model suggested a chemical process. The pseudo second-order kinetic model agreed well for fitting experimental data with the calculated adsorption capacity, qe, (46.5 mg/g), which was reasonably close to the experimental value (47.3 mg/g). Optimization of the process parameters was achieved using response surface methodology (RSM)–Box–Behnken design, where factors considered are represented on three levels: (−1), (0) and (+1) for high, mean and low levels, respectively. ANOVA fits a quadratic model with prob > F less than 0.05 (<0.0001) at 95% confidence level. From this modelling, significant factors for dye removal have been identified.

AB - Activated carbon obtained from plantain peels was applied to the optimization of the adsorption process parameters for abstraction of colour from simulated dye effluent. The activated carbon was prepared and characterized using nitrogen adsorption, X-ray diffractometry (XRD) and Fourier transform infrared spectroscopy (FTIR). Equilibrium isotherms were modelled using the Langmuir, Freundlich, Dubinin–Radushkevich and Temkin models; the Temkin and Dubinin–Radushkevich models provided the best fit for the sorption process, with a correlation coefficient greater than 0.95. The D–R model suggested a chemical process. The pseudo second-order kinetic model agreed well for fitting experimental data with the calculated adsorption capacity, qe, (46.5 mg/g), which was reasonably close to the experimental value (47.3 mg/g). Optimization of the process parameters was achieved using response surface methodology (RSM)–Box–Behnken design, where factors considered are represented on three levels: (−1), (0) and (+1) for high, mean and low levels, respectively. ANOVA fits a quadratic model with prob > F less than 0.05 (<0.0001) at 95% confidence level. From this modelling, significant factors for dye removal have been identified.

KW - Activated carbon

KW - Adsorption

KW - Methylene blue

KW - Plantain peels

KW - Process optimization

UR - http://www.scopus.com/inward/record.url?scp=85142374851&partnerID=8YFLogxK

U2 - 10.1016/j.jtusci.2016.01.003

DO - 10.1016/j.jtusci.2016.01.003

M3 - 文章

AN - SCOPUS:85142374851

SN - 1658-3655

VL - 11

SP - 173

EP - 185

JO - Journal of Taibah University for Science

JF - Journal of Taibah University for Science

IS - 1

ER -